CN109038967B

CN109038967B - Arc-proof motor

Info

Publication number: CN109038967B
Application number: CN201810954335.5A
Authority: CN
Inventors: 常康华
Original assignee: Anhui Zhengfei Electrical Equipment Co ltd
Current assignee: ANHUI ZHENGFEI ELECTRICAL EQUIPMENT Co.,Ltd.
Priority date: 2018-08-21
Filing date: 2018-08-21
Publication date: 2020-07-21
Anticipated expiration: 2038-08-21
Also published as: CN109038967A

Abstract

The invention relates to the field of motors, in particular to an arc-proof motor. When the motor operates normally, the heat driving mechanism extends out to drive the rotary table to rotate, the rotary table drives the two first rods to move towards two sides respectively through rotation, thereby pushing the wedge block to move towards two sides, the wedge block passes through the through hole on the lifting rod to achieve the purpose of moving the lifting rod upwards, thereby driving the lifting plate to move, enabling the friction air bag to be not contacted with the flywheel disc, simultaneously extending the two lifting mechanisms outwards, enabling the first shell to be contacted with the second shell, enabling the first electric contact to be contacted with the second electric contact to form a passage, enabling the motor to start rotating, when the motor operates abnormally, the thermal driving mechanism contracts to enable the lifting mechanism to contract towards the center, the lifting rod drives the first outer shell to move upwards to enable the first outer shell and the second outer shell to be separated, the motor is powered off, the flywheel disc is in contact with the friction air bag to scram the motor, and meanwhile, gas is generated to clean carbon slag generated by the carbon brush to prevent electric arc.

Description

Arc-proof motor

Technical Field

The invention relates to the field of motors, in particular to an arc-proof motor.

Background

The carbon brush of the motor and the carbon brush of the generator are also called as the motor carbon brush or the motor brush, the appearance of the motor carbon brush is similar to that of a rubber strip of a pencil, a lead is led out from the top of the motor carbon brush, and the size of the motor carbon brush is large or small. The wire-wound carbon brush used on the motor often generates sparks, and accidents are easily caused during the sparks to burn the motor, so that the probability of the sparks of the carbon brush is very necessary to be reduced, and the reason that the wire-wound carbon brush on the motor can generate sparks is as follows: when the carbon brush of the wound-rotor motor is used, the carbon brush is continuously abraded in long-term operation, so that the carbon brush emits sparks under various conditions of uneven contact surface, insufficient pressure of the carbon brush or non-roundness of the slip ring, oil drops or other impurities on a bearing falling between the slip ring and the carbon brush and the like. A small method for eliminating carbon brush sparking is as follows: the contact surface of the carbon brush and the slip ring can be polished smooth by using fine sandpaper, or the pressure of the carbon brush can be properly adjusted, whether the slip ring is round or not can be checked, and if the scale is more adhered or retained in the brush holder, the brush can be used for sweeping or the compressed air can be used for blowing. The protection measures of the slip ring and the carbon brush are taken, so that the probability of sparking of the wound click carbon brush can be effectively reduced.

Disclosure of Invention

In order to make up for the defects of the prior art and solve the problems that the motor is damaged by gradual temperature rise during operation, electric arcs are easy to generate and self-protection cannot be realized, the invention provides a technical scheme which can realize self-protection of the motor.

The technical scheme adopted by the invention for solving the technical problems is as follows: an arc-proof motor comprises a shell, a stator, a coil, a lifting mechanism, a flywheel disc, a fan, a rotating shaft, a friction air bag, an opening and closing mechanism, a carbon brush and a slip ring; the shell comprises a host shell and lifting mechanism shells, wherein the host shell and the lifting mechanism shells are both rotary bodies, and the two lifting mechanism shells are fixed on two sides of the host shell; the stator comprises a magnetic pole N and a magnetic pole S, and the magnetic pole N and the magnetic pole S are respectively fixed on the two lifting mechanisms and are positioned inside the shell of the host machine; the two lifting mechanisms penetrate through the upper wall and the lower wall of the main machine shell and are symmetrically installed and used for moving the stator up and down; the part of the two lifting mechanisms penetrating through the host machine shell is positioned in the lifting mechanism shell; the rotating shaft is installed by crossing the shell of the host machine; the fan is arranged at the left end of the rotating shaft, is positioned outside the left side of the shell of the host machine and is used for radiating heat of the motor; the flywheel disc is arranged on the rotating shaft and is positioned on the right side of the inner wall of the left side of the main machine shell; the two friction air bags are symmetrically fixed on the left sides of the two lifting mechanisms and are positioned in the main machine shell, and meanwhile, the friction air bags and the flywheel disc are in the same vertical direction, so that the friction air bags play a role of emergency stop and extrude to generate gas, and carbon slag generated by friction of the carbon brush and the slip ring is swept; the coil penetrates through the rotating shaft and is arranged between the magnetic pole N and the magnetic pole S; the slip ring is arranged on the right side of the rotating shaft and is positioned between the inner wall of the right side of the main machine shell and the coil; the four carbon brushes are symmetrically arranged on the upper inner wall and the lower inner wall of the right side of the main machine shell in pairs and are in contact with the slip ring; the opening and closing mechanism is arranged between the lifting mechanism and the lifting mechanism shell below the host machine shell, one side of the opening and closing mechanism is connected with the lifting mechanism, the other end of the opening and closing mechanism is connected with the lifting mechanism shell, and the opening and the closing of the motor are controlled. When the motor normally operates, two elevating system extend to the outside, contactless between friction pulley and the flywheel dish, and opening and shutting mechanism is normally closed, and the motor circular telegram is rotatory, and when the motor function is unusual, when the temperature rose, elevating system contracts to the center, and opening and shutting mechanism cuts off the motor outage, and friction gasbag and flywheel dish contact simultaneously let the motor carry out scram to produce gas, sweep the carbon residue, prevent that electric arc from producing, reach the effect of protection motor.

Preferably, the lifting mechanism comprises a lifting plate, a spring, a lifting rod, a wedge block, a rotary table, a guide rod and a thermal driving mechanism; the lifting plate is positioned in the main machine shell and connected with the stator; one end of at least five springs is fixed on the inner wall of the host shell, and the other end of the springs is fixed on the lifting plate; the two lifting rods penetrate through the host shell and are fixed on the lifting plate, one lifting plate is used for fixing the two lifting rods, and the through holes are formed in the lifting rods, so that the lifting plate can be kept to be stable in ascending and descending; the guide rod comprises a first rod and a second rod; the turntable is fixed on the outer wall of the host shell, and can rotate between the two lifting rods; one end of the second rod is movably connected with the thermal driving mechanism, and the other end of the second rod is movably connected with the eccentric position of the rotary table; the two wedge blocks are respectively movably connected with the first rods; the first rod is movably connected with the eccentric position of the turntable; when the thermal driving mechanism stretches out to drive the second rod to push the rotary table to rotate, the first rods stretch out towards two sides under the rotation of the rotary table to drive the two wedge blocks to move towards two sides, the wedge blocks lift the lifting rod by penetrating through the through holes in the lifting rod, and the whole lifting mechanism rises, so that the operation of the motor is ensured. When the motor normally operates, the thermal driving mechanism extends out to drive the rotary table to rotate, the rotary table drives the two first rods to move towards two sides respectively through rotation, so that the wedge block is pushed to move towards two sides, the wedge block passes through the through hole in the lifting rod to achieve the purpose of enabling the lifting rod to move upwards, the lifting plate is driven to move, the friction air bag is not in contact with the flywheel disc, meanwhile, the opening and closing mechanism is closed, and the motor normally operates; when the motor operates abnormally, the thermal driving mechanism contracts to enable the lifting mechanism to contract towards the center, the opening and closing mechanism is disconnected, and the flywheel disc is in contact with the friction air bag to stop the motor suddenly.

Preferably, the thermal drive mechanism comprises a combination of a temperature sensor and an electromagnet; temperature-sensing ware 471 is installed in the lifter plate left side, rises when the inside temperature of motor, reaches the dangerous value, and temperature-sensing ware transmission signal controls the electro-magnet outage, and the electro-magnet withdrawal to make elevating system descend, the friction gasbag contacts with the flywheel dish, carries out the scram to the motor, and the extrusion of friction gasbag produces gas and blows away the carbon sediment simultaneously, avoids the carbon sediment to lead to producing electric arc, and the response is effectual, can effectively control the motor scram fast.

Preferably, the friction airbag is made of rubber and is arc-shaped, so that the attaching area of the friction airbag and the flywheel panel can be increased, and sudden stop is accelerated.

Preferably, the friction gasbag includes outlet duct and intake pipe, and when the motor temperature was too high, elevating system descends, and the friction gasbag extrudees with the flywheel dish, can make the motor scram, and the friction gasbag receives the extrusion simultaneously and produces gas, sweeps the carbon brush position, blows off the carbon sediment from theme shell right side wall through-hole, prevents that the carbon sediment from causing electric arc.

Preferably, there are four through-holes in the middle of the flywheel dish, can accelerate the heat dissipation, and as the friction part, participate in the motor scram, the flywheel dish carries out the counter weight simultaneously, can improve motor pivoted stability.

Preferably, the opening and closing mechanism comprises a first electric contact, a second electric contact, a first shell, a second shell, a small spring and a sealing ring; the first shell of the first shell revolving body is internally provided with a first electrical contact, and the first shell is fixed on the end part of a lifting rod on the right side of the lifting mechanism below the main machine shell; the second shell is a revolving body, a second electrical contact is arranged in the second shell, the second shell is fixed at one end of a small spring, the other end of the small spring is fixed on the inner wall of the shell of the lifting mechanism below the shell of the main machine, and the second shell and the first shell are on the same vertical line; the sealing ring is fixed at an opening at the end part of the second shell, and when the first shell and the second shell are combined, the sealing ring is used for sealing, so that the electric arc generated between the electric contacts cannot splash; when the motor normally operates, the two lifting mechanisms extend outwards, the first shell is in contact with the second shell, the first electrical contact is in contact with the second electrical contact to form a passage, the motor starts to rotate, when the temperature of the motor is abnormal, the two lifting mechanisms shrink towards the center, the lifting rod drives the first shell to move upwards to separate the first shell from the second shell, and the motor is powered off.

Therefore, the invention has the following beneficial effects:

1. according to the invention, through the thermal driving mechanism, when the temperature of the motor rises, the thermal driving mechanism contracts to enable the lifting mechanism to contract towards the center, the lifting rod drives the first outer shell to move upwards to separate the first outer shell from the second outer shell, the motor is powered off, meanwhile, the flywheel disc is in contact with the friction airbag to scram the motor, and meanwhile, the friction airbag extrudes to generate gas to clean carbon slag, so that electric arcs generated by the carbon slag are avoided, the self-protection effect is realized when the motor is abnormal, the service life of the motor is prolonged, and the safety performance of the motor is improved;

2. the sealing ring is used, so that the problem of electric arc splashing is avoided, when the first shell and the second shell are combined, the electric contact is sealed in the first shell and the second shell under the action of the sealing ring, other mechanisms cannot be influenced if the electric contact is contacted with the electric arc, and meanwhile, the safety performance of the motor is improved.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a cross-sectional view taken at A-A of FIG. 1 in accordance with the present invention;

FIG. 3 is a cross-sectional view taken at B-B of FIG. 1 in accordance with the present invention;

FIG. 4 is a side view of the friction airbag and flywheel disc of FIG. 1 in accordance with the present invention;

in the figure: the magnetic-levitation friction clutch comprises a shell 1, a stator 2, a coil 3, a lifting mechanism 4, a flywheel disc 5, a fan 6, a rotating shaft 7, a friction airbag 8, an opening and closing mechanism 9, a carbon brush 10, a slip ring 11, a main machine shell 12, a lifting mechanism shell 13, a magnetic pole N21, a magnetic pole S22, a lifting plate 41, a spring 42, a lifting rod 43, a wedge 44, a rotating disc 45, a guide rod 46, a thermal driving mechanism 47, a first rod 461, a second rod 462, a temperature sensor 471, an electromagnet 472, an air outlet pipe 81, an air inlet pipe 82, a first electric contact 91, a second electric contact 92, a first shell 93, a second shell 94, a small spring 96 and a sealing ring 95.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1 to 4, the present invention provides an arc-proof motor, which is characterized in that: the magnetic-levitation brushless motor comprises a shell 1, a stator 2, a coil 3, a lifting mechanism 4, a flywheel disc 5, a fan 6, a rotating shaft 7, a friction air bag 8, an opening and closing mechanism 9, a carbon brush 10 and a slip ring 11; the shell 1 comprises a main machine shell 12 and lifting mechanism shells 13, wherein the main machine shell 12 and the lifting mechanism shells 13 are both revolving bodies, and the two lifting mechanism shells 13 are fixed on two sides of the main machine shell 12; through holes are formed in the left side and the right side of the host shell 12, the left through hole is used for heat dissipation, and the right through hole is used for discharging carbon slag; the stator 2 comprises a magnetic pole N21 and a magnetic pole S22, wherein the magnetic pole N21 and the magnetic pole S22 are respectively fixed on the two lifting mechanisms 4 and are positioned inside the host machine shell 12; the two lifting mechanisms 4 penetrate through the upper wall and the lower wall of the main machine shell 12 and are symmetrically arranged for the up-and-down movement of the stator 2; the two lifting mechanisms 4 penetrate through the part of the main machine shell 12 and are positioned in the lifting mechanism shell 13; the rotating shaft 7 is installed by crossing the main machine shell 12; the fan 6 is arranged at the left end of the rotating shaft 7, is positioned outside the left side of the main machine shell 12 and is used for radiating heat of the motor; the flywheel disc 5 is arranged on the rotating shaft 7 and is positioned on the right side of the inner wall of the left side of the main machine shell 12; the two friction air bags 8 are symmetrically fixed on the left sides of the two lifting mechanisms 4 and are positioned inside the main machine shell 12, the friction air bags 8 and the flywheel disc 5 are in the same vertical direction to play a role in emergency stop, and meanwhile, the friction air bags 8 extrude to generate gas to sweep carbon slag generated by friction of the carbon brushes 10 and the slip ring 11; the coil 3 is installed through the rotating shaft 7 and is positioned between the magnetic pole N21 and the magnetic pole S22; the slip ring 11 is arranged on the right side of the rotating shaft 7 and is positioned between the inner wall of the right side of the main machine shell 12 and the coil 3; the four carbon brushes 10 are symmetrically arranged on the upper inner wall and the lower inner wall of the right side of the main machine shell 12 in pairs and are in contact with the slip ring 11; the opening and closing mechanism 9 is arranged between the lifting mechanism 4 and the lifting mechanism shell 13 below the host machine shell 12, one side of the opening and closing mechanism 9 is connected with the lifting mechanism 4, the other end of the opening and closing mechanism is connected with the lifting mechanism shell 13, and the starting and stopping of the motor are controlled. When the motor normally operates, two elevating system 4 extend to the outside, contactless between friction pulley and the flywheel dish 5, and opening and shutting mechanism 9 is normally closed, and the motor circular telegram is rotatory, and when motor function is unusual, when the temperature risees, elevating system 4 is to the central shrink, and opening and shutting mechanism 9 disconnection motor outage, and 8 and the flywheel dish 5 contacts of friction gasbag simultaneously let the motor carry out scram to produce gas, sweep the carbon sediment, prevent that electric arc from producing, reach the effect of protection motor.

As an embodiment of the present invention, the lifting mechanism 4 includes a lifting plate 41, a spring 42, a lifting rod 43, a wedge 44, a turntable 45, a guide rod 46, and a thermal driving mechanism 47; the lifting plate 41 is positioned inside the main machine shell 12 and is connected with the stator 2; one end of at least five springs 42 is fixed on the inner wall of the main machine shell 12, and the other end is fixed on the lifting plate 41; the two lifting rods 43 penetrate through the main machine shell 12 and are fixed on the lifting plate 41, one lifting plate 41 is used for fixing the two lifting rods 43, and the through holes are formed in the lifting rods 43, so that the lifting plate 41 can be kept to be lifted and lowered stably; the guide rod 46 comprises a first rod 461 and a second rod 462; the turntable 45 is fixed on the outer wall of the main machine shell 12, and the turntable 45 can rotate between the two lifting rods 43; one end of the second rod 462 is movably connected with the thermal driving mechanism 47, and the other end is movably connected with the eccentric position of the turntable 45; the two wedges 44 are movably connected with the two first rods 461 respectively; the first rod 461 is movably connected with the eccentric position of the turntable 45; when the thermal driving mechanism 47 extends to drive the second rod 462 to push the rotating disc 45 to rotate, the first rods 461 extend towards two sides under the rotation of the rotating disc 45 to drive the two wedges 44 to move towards two sides, the wedges 44 pass through the through holes on the lifting rod 43 to lift the lifting rod 43, and the whole lifting mechanism 4 rises, thereby ensuring the operation of the motor. When the motor operates normally, the thermal driving mechanism 47 extends out to drive the rotating disc 45 to rotate, the rotating disc 45 drives the two first rods 461 to move towards two sides respectively through rotation, so as to push the wedge block 44 to move towards two sides, the wedge block 44 achieves the purpose of enabling the lifting rod 43 to move upwards through penetrating through the through hole in the lifting rod 43, so as to drive the lifting plate 41 to move, so that the friction air bag 8 is not in contact with the flywheel disc 5, meanwhile, the opening and closing mechanism 9 is closed, and the motor operates normally; when the motor operates abnormally, the thermal driving mechanism 47 contracts to enable the lifting mechanism 4 to contract towards the center, the opening and closing mechanism 9 is disconnected, and the flywheel disc 5 is in contact with the friction air bag 8 to stop the motor suddenly.

As an embodiment of the present invention, the thermal driving mechanism 47 includes a combination of a temperature sensor 471 and an electromagnet 472; temperature-sensing ware 471 is installed in lifter plate 41 left side, rises when the inside temperature of motor, reaches the dangerous value, and temperature-sensing ware 471 transmission signal, control electro-magnet 472 outage, electro-magnet 472 withdrawal to make elevating system 4 descend, friction gasbag 8 and flywheel dish 5 contact carry out the scram to the motor, 8 extrusion production gas of friction gasbag simultaneously blow away the carbon sediment, avoid the carbon sediment to lead to producing electric arc, but respond to effectually, can effectively control the motor scram fast.

In one embodiment of the present invention, the friction airbag 8 is made of rubber and has an arc shape, so that the area of attachment with the flywheel disk 5 can be increased, and sudden stop can be accelerated.

In an embodiment of the invention, the friction airbag 8 includes an air outlet pipe 81 and an air inlet pipe 82, when the temperature of the motor is too high, the lifting mechanism descends, the friction airbag 8 is pressed with the flywheel disk 5, so that the motor can be suddenly stopped, and meanwhile, the friction airbag 8 is pressed to generate gas to purge the carbon brush 10, so that carbon slag is blown out from the through hole on the right side wall of the main body shell 12, and electric arc caused by the carbon slag is prevented.

As an implementation mode of the invention, the middle of the flywheel disc 5 is provided with four through holes, so that the heat dissipation can be accelerated, the flywheel disc 5 is used as a friction piece to participate in the sudden stop of the motor, and meanwhile, the flywheel disc 5 is used for balancing weight, so that the rotation stability of the motor can be improved.

As an embodiment of the present invention, the opening and closing mechanism 9 includes a first electrical contact 91, a second electrical contact 92, a first housing 93, a second housing 94, a small spring 96 and a sealing ring 95; the first shell 93 is a revolving body, a first electrical contact 91 is arranged in the first shell 93, and the first shell 93 is fixed on the end part of the right lifting rod 43 of the lifting mechanism 4 below the main machine shell 12; the second shell 94 is a revolving body, a second electrical contact 92 is arranged in the second shell 94, the second shell 94 is fixed at one end of a small spring 96, the other end of the small spring 96 is fixed on the inner wall of the lifting mechanism shell 13 below the main machine shell 12, and the second shell 94 and the first shell 93 are on the same vertical line; the sealing ring 95 is fixed at an opening at the end part of the second shell 94, when the first shell 93 and the second shell 94 are combined, the sealing ring 95 is sealed, and if electric arcs are generated between the electric contacts, the electric arcs cannot be splashed; when the motor normally operates, the two lifting mechanisms 4 extend outwards, the first shell 93 is in contact with the second shell 94, the first electric contact 91 is in contact with the second electric contact 92 to form a passage, the motor starts to rotate, when the temperature of the motor is abnormal, the two lifting mechanisms 4 contract towards the center, at the moment, the lifting rod 43 drives the first shell 93 to move upwards to separate the first shell 93 from the second shell 94, and the motor is powered off.

When the motor operates normally, the thermal driving mechanism 47 extends out to drive the rotating disc 45 to rotate, the rotating disc 45 drives the two first rods 461 to move towards two sides respectively through rotation, so as to push the wedge block 44 to move towards two sides, the wedge block 44 achieves the purpose of enabling the lifting rod 43 to move upwards through a through hole on the lifting rod 43, so as to drive the lifting plate 41 to move, so that the friction air bag 8 is not contacted with the flywheel disc 5, meanwhile, the two lifting mechanisms 4 extend towards the outer side, the first shell 93 is contacted with the second shell 94, the first electric contact 91 is contacted with the second electric contact 92 to form a passage, the motor starts to rotate, when the motor operates abnormally, the thermal driving mechanism 47 contracts, so that the lifting mechanism 4 contracts towards the center, the lifting rod 43 drives the first shell 93 to move upwards to be separated from the second shell 94, the motor is powered off, the flywheel disc 5 is contacted with the friction air bag 8 to perform emergency stop, and meanwhile, the generated gas cleans carbon slag generated by the carbon brush 10, so that electric arc is prevented from being generated.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An arc-resistant motor, characterized by: the device comprises a shell (1), a stator (2), a coil (3), a lifting mechanism (4), a flywheel disc (5), a fan (6), a rotating shaft (7), a friction air bag (8), an opening and closing mechanism (9), a carbon brush (10) and a slip ring (11); the shell (1) comprises a main machine shell (12) and lifting mechanism shells (13), wherein the main machine shell (12) and the lifting mechanism shells (13) are both revolving bodies, and the two lifting mechanism shells (13) are fixed on two sides of the main machine shell (12); through holes are formed in the left side and the right side of the host shell (12), the left through hole is used for heat dissipation, and the right through hole is used for discharging carbon slag; the stator (2) comprises a magnetic pole N (21) and a magnetic pole S (22), and the magnetic pole N (21) and the magnetic pole S (22) are respectively fixed on the two lifting mechanisms (4) and are positioned inside the host shell (12); the two lifting mechanisms (4) are symmetrically arranged by penetrating through the upper wall and the lower wall of the main machine shell (12) and are used for moving the stator (2) up and down; the part of the two lifting mechanisms (4) penetrating through the main machine shell (12) is positioned in the lifting mechanism shell (13); the rotating shaft (7) is installed by crossing the main machine shell (12); the fan (6) is arranged at the left end of the rotating shaft (7), is positioned outside the left side of the host machine shell (12), and is used for dissipating heat of the motor; the flywheel disc (5) is arranged on the rotating shaft (7) and is positioned on the right side of the inner wall of the left side of the main machine shell (12); the two friction air bags (8) are symmetrically fixed on the left sides of the two lifting mechanisms (4) and are positioned inside a main machine shell (12), the friction air bags (8) and the flywheel disc (5) are in the same vertical direction to play a role in emergency stop, the friction air bags (8) extrude to generate gas, and carbon slag generated by friction of the carbon brush (10) and the slip ring (11) is swept; the coil (3) penetrates through the rotating shaft (7) and is arranged between the magnetic pole N (21) and the magnetic pole S (22); the slip ring (11) is arranged on the right side of the rotating shaft (7) and is positioned between the inner wall of the right side of the main machine shell (12) and the coil (3); the four carbon brushes (10) are symmetrically arranged on the upper inner wall and the lower inner wall of the right side of the main machine shell (12) in pairs and are in contact with the slip ring (11); the opening and closing mechanism (9) is installed between the lifting mechanism (4) and the lifting mechanism shell (13) below the host machine shell (12), one side of the opening and closing mechanism (9) is connected with the lifting mechanism (4), the other end of the opening and closing mechanism is connected with the lifting mechanism shell (13), and the starting and stopping of the motor are controlled.

2. The arc resistant motor of claim 1, wherein: the lifting mechanism (4) comprises a lifting plate (41), a spring (42), a lifting rod (43), a wedge block (44), a turntable (45), a guide rod (46) and a thermal driving mechanism (47); the lifting plate (41) is positioned inside the main machine shell (12) and is connected with the stator (2); one ends of at least five springs (42) are fixed on the inner wall of the host machine shell (12), and the other sides of the springs are fixed on the lifting plate (41); the two lifting rods (43) penetrate through the host machine shell (12) and are fixed on the lifting plate (41), one lifting plate (41) is used for fixing the two lifting rods (43), and through holes are formed in the lifting rods (43), so that the lifting plates (41) can be kept to be lifted and lowered stably; the guide rod (46) comprises a first rod (461) and a second rod (462); the turntable (45) is fixed on the outer wall of the main machine shell (12), and the turntable (45) can rotate between the two lifting rods (43); one end of the second rod (462) is movably connected with the thermal driving mechanism (47), and the other end of the second rod is movably connected with the eccentric position of the turntable (45); the two wedges (44) are respectively movably connected with the two first rods (461); the first rod (461) is movably connected with the eccentric position of the turntable (45); when the thermal driving mechanism (47) extends out to drive the second rod (462) to push the turntable (45) to rotate, the first rods (461) extend out towards two sides under the rotation of the turntable (45) to drive the two wedge blocks (44) to move towards two sides, the wedge blocks (44) pass through the through holes in the lifting rod (43) to lift the lifting rod (43), and the whole lifting mechanism (4) rises, so that the operation of the motor is ensured.

3. The arc resistant motor of claim 2, wherein: the thermal drive mechanism (47) comprises a combination of a temperature sensor (471) and an electromagnet (472); temperature-sensing ware (471) is installed in lifter plate (41) left side, rise when the inside temperature of motor, reach dangerous value, temperature-sensing ware (471) transmission signal, control electro-magnet (472) outage, electro-magnet (472) withdrawal, thereby make elevating system (4) descend, friction gasbag (8) and flywheel dish (5) contact, carry out scram to the motor, friction gasbag (8) extrusion production is gaseous blows away the carbon sediment simultaneously, avoid the carbon sediment to lead to producing electric arc, respond to effectually, can effectively control the motor scram fast.

4. The arc resistant motor of claim 1, wherein: the friction air bag (8) is made of rubber, the middle of the friction air bag is a cavity, the friction air bag is arc-shaped, the bonding area of the friction air bag and the flywheel disc (5) can be increased, and sudden stop is accelerated.

5. The arc resistant motor of claim 1, wherein: friction gasbag (8) include outlet duct (81) and intake pipe (82), and when motor high temperature, elevating system descends, and friction gasbag (8) and flywheel dish (5) extrusion can make the motor scram, and friction gasbag (8) receive the extrusion to produce gas simultaneously, sweep carbon brush (10) position, blow off carbon residue from main body cover (12) right side wall through-hole, prevent that carbon residue from causing electric arc.

6. The arc resistant motor of claim 1, wherein: there are four through-holes in the middle of flywheel dish (5), can accelerate the heat dissipation, and as the friction part, participate in the motor scram, flywheel dish (5) carry out the counter weight simultaneously, can improve motor pivoted stability.

7. An arc-resistant motor as claimed in claim 1 or 2, characterized in that: the opening and closing mechanism (9) comprises a first electric contact (91), a second electric contact (92), a first shell (93), a second shell (94), a small spring (96) and a sealing ring (95); the first shell (93) is a revolving body, a first electrical contact (91) is arranged in the first shell (93), and the first shell (93) is fixed on the end part of a right lifting rod (43) of the lifting mechanism (4) below the main machine shell (12); the second shell (94) is a revolving body, a second electrical contact (92) is installed in the second shell (94), the second shell (94) is fixed at one end of a small spring (96), the other end of the small spring (96) is fixed on the inner wall of the lifting mechanism shell (13) below the main machine shell (12), and the second shell (94) and the first shell (93) are on the same vertical line; the sealing ring (95) is fixed at an opening at the end part of the second shell (94), when the first shell (93) and the second shell (94) are combined, the sealing ring (95) is used for sealing, and if electric arcs are generated between the electric contacts, the electric contacts cannot be splashed; when the motor normally operates, the two lifting mechanisms (4) extend outwards, the first shell (93) is in contact with the second shell (94), the first electric contact (91) is in contact with the second electric contact (92) to form a passage, the motor starts to rotate, when the temperature of the motor is abnormal, the two lifting mechanisms (4) shrink towards the center, the lifting rod (43) drives the first shell (93) to move upwards to separate the first shell from the second shell (94), and the motor is powered off.